端面抽运Nd∶YAG陶瓷1.83μm激光

End pumped Nd∶YAG ceramics laser emitting at 1.83 μm

报道了基于Nd∶YAG透明陶瓷4F3/2-4I15/2跃迁实现1.83μm激光输出的研究。采用简单紧凑的平凹腔结构,结合对腔镜镀膜参数的设计,控制其他能级跃迁谱线对应波长激光的透射损耗来抑制较强能级跃迁对应的激光振荡。在入射抽运功率14.6W的808nm波长半导体激光端面抽运Nd∶YAG透明陶瓷,获得了0.65 W的1.83μm激光输出,斜率效率5.8%。可见Nd∶YAG透明陶瓷可望成为获得1.8μm波段激光直接输出的激光介质。

1.83 μm laser output was achieved based on the Ndz YAG transparent ceramic with 4F3/2-4I15/2 transition. Using compact plane-concave cavity, the laser oscillations with strong energy level transitions were suppressed by controlling the loss of stronger transition line based on reasonable cavity mirror coating. At the incident pump power of 14.6 W, 1.83μm laser with output power of 0.65 W and slope efficiency of 5.8% was obtained by the laser diode end pumped Nd： YAG ceramic system. Therefore, Nd： YAG is expected to be a laser medium for directly output 1.83 μm laser wavelength.